the former navy seal who survived four tours in iraq -- four -- and wrote a best-selling books on becoming a sniper -- the sheriff at the shooting range says christ kyle and a friend were working with this man right here, a former marine named eddie ray rout, and he may have been struggling with post traumatic stress disorder. they seem confident he was suffering with something. whether it was related to combat or not is not matter. he didn't actually serve in combat. cops say this man, eddie ray routh killed the two men, drove off in the former seal's truck and told his sister what he did. we're told the sister then reported it to police and the cops arrestedie routh after a short chase. cries kyle was a highly decorated american hero who recorded more than 150 kills in iraq. he later founded a nonprofit tee voted to helping fellow soldiers cope with visible and invisible wound of war and made sever appearances on this network. >> do you ever now, looking back, have in regrets about anything you did? >> ey, i do. i have some people i could save. >> the americans you couldn't save? >> amer